Aiwa-XRMD100-cs-sm1维修电路原理图.pdf

MD/CD STEREO SYSTEMXR-MD100XR-MD101S/M Code No. 09-993-315-0S1U(S),K(S)EZ(S)SERVICE MANUALSUPPLEMENTThis service manual contains information only on the TEST MODE and ELEC-TRICAL ADJUSTMENT of XR-MD100(U,K)/MD101(EZ).For more information, please refer to the following service manuals.XR-MD100 U (S/M Code No.09-993-315-0R1)XR-MD100 K/MD101 EZ (S/M Code No.09-993-315-0R3).DATA BASIC TAPE MECHANISM : 2ZM-1 YR9 BASIC CD MECHANISM : 3ZG-3 E3N BASIC MD MECHANISM : 7ZG-9 YBRadioFans.CN 收音机爱 好者资料库21. CD Test Mode1-1. Starting Up the CD Test ModeWhile pressing the “CD” button, connect the AC plug to the power outlet. When the CD test mode starts up, all displays turn on.1-2. How to Release the CD Test ModeTo release the CD test mode, press the “POWER” button or the function buttons other than the “CD” button, or disconnect theAC plug from the power outlet.1-3. Function Description of the Test ModeNote: If the focus search operation is continued for 10 minutes or longer, the driver IC heats up sufficiently to trigger the protectioncircuit, which stops the CD system. Turn off the main power and re-start operation about 10 minutes later.2. MD Test Mode2-1. Starting Up the MD Test ModeWhile pressing the “MD” button, connect the AC plug to the power outlet. About one second later after the MD test mode hasstarted up, the following message appears and the MD test mode becomes operable.Note: 1.If operation of the mechanism shows any abnormality during the test mode, disconnect the AC plug immediately.2.Playback and recording are not possible during the test mode.3.If a disc cannot be inserted, insert a disc part way and press the “CD 2 MD DIRECT REC” button. The disc can then befully inserted.MODEStart modeFocus search modePlay modeTraverse modeSled modeOperationCD key + ACplug INSTOP keyPLAY keyPAUSE keyF.SKIP keyB.SKIP keyIndication ondisplayAll indicators lightCDTrack No. andplaying time(spectrum analyzer)Track No. andplaying timeCD TESTFunction and movement CD TEST mode starts All indicators light LD lights Continuous focus search Continuous spindle motorkick Normal playback When TOC reading is notpossible, the focus searchcontinues Tracking servo is turned off The pickup moves to theinnermost track The pickup moves to theoutermost trackCheck item Check all indicators light Microprocessor DATA BUS LINE APC circuit LASER current Check the focus searchwaveform Check the focus errorwaveform Focus servo circuit DRF output Spindle servo line Same checks as shown in theabove column Each servo circuit Check the tracking errorwaveform Tracking circuit Sled circuit Mechanism (gear and motor)MDTSETTEST MODERadioFans.CN 收音机爱 好者资料库32-2. How to Exit the MD Test Mode1) Press the “MD EJECT” button and remove the disc.2) Disconnect the AC plug from the power outlet.*If the machine exits the MD test mode by any methods other than the procedure described above, the machine may operateabnormally when the POWER is turned on next time. If this happens, disconnect the AC plug.2-3. Operation Check Mode1) Checks after the test mode has started upThe following playback audio circuits can be checked.The circuits that can be checked:. DAC, LINE AMP and HEADPHONE AMPOutput level: . 1 kHz, -21 dB2) Switch status checkThe ON/OFF states of the respective switches on the machine and mechanism can be checked on the display.3) How to Switch to Servo Standby ModeWhen the MD test mode has been established, the mode changes to the servo standby mode and “ALL SV OFF” is displayedby pressing the 9 button. The various check modes can be entered from this mode. Pressing the 9 button during eachoperation returns to “ALL SV OFF”.4) Checking the Sled OperationThe operation of the sled motor and pickup can be checked by pressing the 6 (to outermost track) and 5 (to innermosttrack) buttons in the “ALL SV OFF” state. “T.SLED FWD” appears while moving to the outermost track and “T.SLEDRVS” appears while moving to the innermost track.5) Checking the Laser OutputThe laser power output level is switched each time the “MD EDIT” button is pressed when “ALL SV OFF” appears and theoperation stops. The laser power output level is repeatedly changed in the order of OFF LASER READ LASER 1/2 LASER WRITE. The indications are as follows.*After checking, press the 9 button to return the display to “ALL SV OFF”.6) Checking the Operation of OWH (Over Write Head)The OWH operation can be checked in the loading-completed state.“MD 2 CD” button .OWH DOWN“ / MD EJECT” button.OWH UPNote: Do not move down the OWH while using a high reflection disc (CD).Switch NameSwitch StateIndication on displayUsable discREC PROTECTWhen the write-protection tab of a disc is closed to ONROCKDisc for record/playbackREFRECTWhen the high reflection disc (CD) is usedPOPDisc for playback onlyINNERWhen the pickup is at the innermostJAZZtrack (when the LIMIT switch is ON)A LSVLOFFMODEIndication on displayOFFALL SV OFFT-BASSLASER READLASER READT-BASS LASER 1/2 WRITELASER 1/2T-BASS LASER WRITELASER WRITET-BASS RadioFans.CN 收音机爱 好者资料库47) Checking the focus search and spindle kickThe focus search and the spindle kick can be checked by pressing the W button in the “ALL SV OFF” state withoutinserting a disc. During checking, the message “FOCUS SEARCH” is displayed.After checking these operations, press the 9 button to return the display to “ALL SV OFF”.8) Checking the focus servoInsert a test disc.Move the pickup to the center track using the 6 and 5 buttons.Press the “MD MODE” button until the following servo mode is selected in accordance with the inserted disc.MO disc (MO) .Display “SELECT GRV”. (“TIME MARK” lights.)PIT disc (CD).Display “SELECT PIT”. (“AUTO MARK” lights.)Press the W button. If the focus servo is operating normally, the message “FOCUS ON!” is displayed after “FOCUSSEARCH”.After the checking is completed, press the 9 button to return the display to “ALL SV OFF”.9) Checking that all servo loops are turned onThe tracking servo and the sled servo are turned on and all servo loops work when the “ENTER” button is pressed in the“FOCUS ON!” state.If all servo loops are normal, “ALL SV OFF” is displayed.After the checking is completed, press the 9 button to return the display to “ALL SV OFF”.3. Adjustment Mode3-1. Temperature Compensation AdjustmentTest point: Check the test point on the display.Tool: ThermometerAdjustment procedure:1) After the MD test mode has started up, press the 9 button to display “ALL SV OFF”.2) Press the “DISPLAY” button to display “TMP = $”.3) Press the ; button to display “TMP + *C: + 00”.4) Put the thermometer near the MD mechanism to measure the room temperature.5) Adjust the indication value * using the 5 button and 6 button until the value is the same as the room temperature. Afterthe adjustment is complete, press the “ENTER” button.6) Then, press the 9 button to return the display to “ALL SV OFF”.7) After the above setting, reduce or add the value indicated by the sharp sign (#) of “TMP + *C: + #” from or to the valueindicated by the asterisk (*) of “TMP + *C: + #”. The calculated value must be the room temperature.Note: Normally, do not perform the temperature compensation adjustment.FOSUOCN !A LSVLONRadioFans.CN 收音机爱 好者资料库53-2. Laser Power AdjustmentTest point: Pickup laser outputTool: Laser power meterAdjustment procedure:1) Press the “MD EDIT” button three times in the “ALL SV OFF” state to change the display to “LASER WRITE”.2) Press the ; button to change the display to “LASER = $*”.3) Adjust the laser power meter so that the value is within 6.8 0.03 mW using the 5 button or 6 button.4) After adjustment, press the “ENTER” button and press the 9 button to return the display to “ALL SV OFF”.Note: If the laser power exceeds 7.0 mW, the pickup may be damaged.3-3. Adjustment and Check of Auto SequenceTest disc: MDW-60, TGYS-1When adjusting the MO disc:1) Insert the test disc MDW-60.2) Press the “MD MODE” button to display “SELECT GRV”.3) Press the “MD” button to display “AUTO ADJ”. After adjustment, “DONE” appears.(If “FAILED” is displayed, the adjustment failed.)4) After the adjustment is completed normally, press the 9 button to return the display to “ALL SV OFF”.Note: 1.Be sure to use a clean disc because adjustment may be impossible if the disc is dirty or scratched.2.Be sure to use an MO disc for recording because the writing power of the MO disc is tested and part of the recorded data iserased.How to check the IVR, EFB and focus/tracking/sled gain1) Move the pickup to the center track using the 5 button and 6 button.2) Press the W button to display “FOCUS ON!”.3) Press the “ENTER” button to switch the mode to “ALL SV ON”.4) Press the 9 button and press the “DISPLAY” button twice. Then, confirm that the values of “IV$*:EF$” are within thefollowing ranges.“*” . 03-07“” . 09-125) Press the “DISPLAY” button again to display “GF* + #s33”. Confirm that the values of the hexadecimal indication ondisplay are within the following ranges.“*” . 20-40“#” . 15-35“33” . 15-356) After adjustment, press the 9 button to return the display to “ALL SV OFF”.When adjusting the PIT disc:1) Insert the test disc TGYS-1.2) Press the “MD MODE” button to display “SELECT PIT”.3) Press the “MD” button to display “AUTO ADJ”. After adjustment, “DONE” appears.(If “FAILED” is displayed, the adjustment failed.)4) After the adjustment is completed normally, press the 9 button to return the display to “ALL SV OFF”. Checking the IVR,EFB and focus/tracking/sled gain of the PIT disc Confirm that the values on the display are within the following ranges.“IVR” .13-19“EFB”.09-12“Focus gain”. 2A-45“Tracking gain”. 20-40“Sled gain” . 20-40RadioFans.CN 收音机爱 好者资料库63-4. Checking the Playback Error Rate (PIT disc)1) Insert the test disc TGYS-1.2) Move the pickup to the center track using the 5 button and 6 button.3) Press the “MD MODE” button to display “SELECT PIT”.4) Press the W button to display “FOCUS ON!”.5) Press the “ENTER” button to display “ALL SV ON”, and press the “DISPLAY” button to confirm that the address displayadvances regularly.6) Press the “DISPLAY” button again to display the playback error rate, and confirm that the value shown by the asterisks(*) of “Er*:#” is “0030” or less.7) After adjustment, press the 9 button to return the display to “ALL SV OFF”.3-5. Checking the Record/Playback Error Rate (MO disc)1) Insert the test disc MDW-60.2) Move the pickup to the center track using the 5 button and 6 button.3) Press the “CD” button; OWH starts moving and recording from the 600th cluster.4) After recording for about 15 seconds, press the 9 button to display “ALL SV OFF”5) Press the “AUX” button to change the mode to “ALL SV ON”, and press the “DISPLAY” button at the 600th cluster. Then,confirm that the value shown by the asterisks (*) of “Er*:#” is “0020” or less.6) After adjustment, press the 9 button to return the display to “ALL SV OFF”.3-6. UTOC ErasePerform the following procedure if the recorded disc needs to be erased.1) Insert the test disc of the UTOC to be erased.2) Move the pickup to the center track using the 5 button and 6 button.3) Press the “MD MODE” button to display “SELECT GRV”.4) Press the “MD REC” button to display “REC Analog”.5) Press the W button to display “FOCUS ON!”.6) Press the “ENTER” button to display “ALL SV ON”.7) Press the “TAPE REC/REC MUTE” button to display “UTOC ERASE”. The UTOC is erased.8) After the UTOC is erased, “ALL SV OFF” appears on the display.RadioFans.CN 收音机爱 好者资料库7Note: Connect a probe (10:1) for adjustment. Connect the ground (-) terminal of the oscilloscopeprobe to TP3 (VREF) for all adjustments.1.Focus Bias AdjustmentPerform the focus bias adjustment when replacing the opticalblock to be repaired.Oscilloscope (DC range)+RFVREF1) Connect an oscilloscope to test points RF and VREF.2) Turn on the power switch.3) Insert the test disc TCD-782 (YEDS-18) and play back thesecond program.4) Adjust SRF130 so that the waveforms of the oscilloscopehave maximum amplitude and the lozenge shape ofwaveforms is clear. 0VEYE PATTERNmust be CLEAR and MAX.MAX1.80.1 Vp-pVOLT/DIV: 0.5VTIME/DIV: 0.5S2.Tracking Balance AdjustmentOscilloscope (DC range)+TEVREF1) Connect the oscilloscope to the test points TE and VREF.2) Start up the CD test mode.3) Insert the test disc TCD-782 (YEDS-18) to switch the CDtest mode to the traverse mode.4) Confirm that the traverse waveform of the oscilloscope isvertically symmetrical as shown in the figure below.5) After checking, release the CD test mode.ABA=BVREFVOLT/DIV: 20mVTIME/DIV: 1mS3.Laser Current AdjustmentThe laser current can be checked on R2 (voltage across 10). The difference from the value shown on the label must bewithin 6.0 mA.KSS-213F15165SG44244.2mAVoltage across R210Laser current Iop =ELECTRICAL ADJUSTMENTIC1IC2RFVREFTER2SFR130CD C.BC41R6C12C141RadioFans.CN 收音机爱 好者资料库931196Printed in Singapore211, IKENOHATA 1CHOME, TAITO-KU, TOKYO 110, JAPAN TEL:03 (3827) 3111RadioFans.CN 收音机爱 好者资料库